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DISCONTINUED OPERATIONS (Details) (USD $) In Millions, except Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended |  |  | 3 Months Ended | 12 Months Ended |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2012 Container and charter liabilities | Dec. 31, 2011 Container and charter liabilities | Dec. 31, 2012 Other contractual liabilities | Dec. 31, 2011 Other contractual liabilities | Dec. 31, 2012 CLX2 Service | Dec. 31, 2011 CLX2 Service | Dec. 31, 2010 CLX2 Service | Sep. 30, 2011 CLX2 Service item | Jul. 31, 2012 CLX2 Service Container and charter liabilities item | Sep. 30, 2011 CLX2 Service Other contractual liabilities item | Dec. 31, 2012 A&B | Dec. 31, 2011 A&B | Dec. 31, 2010 A&B | Jun. 29, 2012 A&B | Dec. 31, 2012 A&B Continuing operations | Dec. 31, 2011 A&B Continuing operations | Dec. 31, 2010 A&B Continuing operations | Dec. 31, 2012 A&B Discontinued operations | Dec. 31, 2011 A&B Discontinued operations | Dec. 31, 2010 A&B Discontinued operations
Accounting for and Classification of Discontinued Operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares of common stock of A&B received for each share upon separation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |  |  |  |
Number of vessels used in discontinued operation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels expected to be sub-chartered |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |
Number of vessels returned to lessors |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |
Duration of charter contracts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 year |  |  |  |  |  |  |  |  |  |
Fair value of the obligations arising from exit activities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4.9 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income (losses) from discontinued operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 92.7 | 28.6 |  |  |  | 116.4 | 274.7 | 276.3 |  |  |  |  |  |  |
Expenses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (4.4) | (149.4) | (47.9) |  |  |  | (118.1) | (243.5) | (244.6) |  |  |  |  |  |  |
Tax (expense) benefit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.6 | 21.1 | 7.2 |  |  |  | (1.6) | (7.2) | 2.0 |  |  |  |  |  |  |
Net (loss) income from A&B |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (3.3) | 24.0 | 33.7 |  | (4.0) | 8.4 | (0.4) | 2.4 | 14.3 | 34.1
(Loss) income from discontinued operations (net of tax) | (0.1) | 0.1 | (7.5) | 1.4 | (5.1) | (9.7) | 1.0 | 2.2 | (6.1) | (11.6) | 21.6 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liabilities of Disposal Group (Including Discontinued Operation) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance, beginning of period |  |  |  | 4.9 |  |  |  |  | 4.9 |  |  | 4.8 |  | 0.1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expenses incurred | 4.5 |  |  |  | 12.5 |  |  |  | 4.5 | 12.5 |  | 4.5 | 11.8 |  | 0.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amounts paid |  |  |  |  |  |  |  |  | (9.4) | (7.6) |  | (9.3) | (7.0) | (0.1) | (0.6) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance, end of period |  |  |  |  | $ 4.9 |  |  |  |  | $ 4.9 |  |  | $ 4.8 |  | $ 0.1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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